This is my sister-in-law Luisa’s recipe. It comes from Chioggia, where they have lots of radicchio. It is surprisingly good with a lovely texture, and it keeps well.
Preheat the oven to 180°C (350°F/Gas 4). Butter a round 20 cm (8 inch) springform cake tin. Scatter the breadcrumbs in and shake it so the breadcrumbs stick to the butter. Shake out the excess.